[Sync] Move sync/{internal_api,syncable} into syncer namespace

sync/internal_api/public/write_transaction.h

Index: sync/internal_api/public/write_transaction.h
diff --git a/sync/internal_api/public/write_transaction.h b/sync/internal_api/public/write_transaction.h
index e72ae717b65bf6119f741b383e1ce1d723cae885..df27cad62dd05a48b8d5815b37234bada90e7c18 100644
--- a/sync/internal_api/public/write_transaction.h
+++ b/sync/internal_api/public/write_transaction.h
@@ -9,17 +9,17 @@
 #include "base/compiler_specific.h"
 #include "sync/internal_api/public/base_transaction.h"
 
-namespace syncable {
-class BaseTransaction;
-class WriteTransaction;
-}  // namespace syncable
-
 namespace tracked_objects {
 class Location;
 }  // namespace tracked_objects
 
 namespace syncer {
 
+namespace syncable {
+class BaseTransaction;
+class WriteTransaction;
+}  // namespace syncable
+
 // Sync API's WriteTransaction is a read/write BaseTransaction.  It wraps
 // a syncable::WriteTransaction.
 //